Willi Keller's The Circle Quartet brings together an impressive variety of musical backgrounds and influences, ranging from deeply rooted jazz and classical music to the frontiers of free improvisation. Hans Peter Hiby, known for his powerful presence and innovation in the field of avant-garde jazz, joins Rieko Okuda's virtuoso piano playing, Meinrad Kneer's masterful double bass, and Willi Keller's dynamic drumming to form an ensemble that takes the audience into new musical dimensions.